CN213652331U - Reaction device for preparing bronopol - Google Patents
Reaction device for preparing bronopol Download PDFInfo
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- CN213652331U CN213652331U CN202022256046.3U CN202022256046U CN213652331U CN 213652331 U CN213652331 U CN 213652331U CN 202022256046 U CN202022256046 U CN 202022256046U CN 213652331 U CN213652331 U CN 213652331U
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Abstract
The utility model discloses a reaction device for preparing bronopol, which comprises a reaction kettle; a distillation kettle, a dissolving kettle, a filter, a cooling crystallization kettle, a centrifuge, a rotary dryer and a product collecting tank which are sequentially communicated with the reaction kettle; the reaction liquid outlet of the reaction kettle is communicated with the liquid inlet of the distillation kettle; the gas outlet of the distillation kettle is communicated with the liquid inlet of the reaction kettle through a condenser; a washing liquid outlet of the centrifuge is communicated with a liquid inlet of the reaction kettle through a circulating pump; a first stirring device is arranged in the reaction kettle, and comprises a first stirring shaft arranged in the reaction kettle, a plurality of annular stirring discs arranged on the first stirring shaft and a plurality of stirring rods circumferentially arranged on the annular stirring discs; an arc-shaped stirring rod is arranged at the bottom of the first stirring shaft; the bottom of the arc-shaped stirring rod is provided with a plurality of spoilers. The reaction device can realize the full mixing reaction among the raw materials and can realize the recycling of the solvent.
Description
Technical Field
The utility model relates to a chemical industry equipment field, concretely relates to a reaction unit for preparing bromine nitryl alcohol.
Background
Bronopol, also known as 2-bromo-2-nitro-1, 3-propanediol) is a spectrum bactericide, is odorless or slightly bromized, is white or light yellow crystal powder, is easily soluble in water and polar solvents, has strong activity and low use concentration, does not irritate the skin, and is an ideal preservative in cosmetics.
The prior method of bronopol mainly uses nitromethane as raw material, alcohol and water as solvents, and prepares a target product by alkane hydroxylation, bromination, distillation and recrystallization in sequence. However, in the existing equipment for producing bronopol, the raw materials are often difficult to be fully mixed, and the heat exchange efficiency in the reaction kettle is poor, so that the yield of bronopol is low, the solvent consumption in production is large, and the production cost is increased.
Disclosure of Invention
The utility model discloses the technical problem that will solve is: aiming at the defects in the prior art, the reaction device for preparing the bronopol can realize the full mixing reaction among the raw materials and the recycling of the solvent.
In order to solve the technical problem, the technical scheme of the utility model is that:
a reaction device for preparing bronopol comprises a reaction kettle; a distillation kettle, a dissolving kettle, a filter, a cooling crystallization kettle, a centrifugal machine, a rotary dryer and a product collecting tank which are sequentially communicated with the reaction kettle; the reaction liquid outlet of the reaction kettle is communicated with the liquid inlet of the distillation kettle; the gas outlet of the distillation kettle is communicated with the liquid inlet of the reaction kettle through a condenser; a washing liquid outlet of the centrifugal machine is communicated with a liquid inlet of the reaction kettle through a circulating pump;
a first stirring device is arranged in the reaction kettle and comprises a first stirring shaft arranged in the reaction kettle, a plurality of annular stirring discs arranged on the first stirring shaft and a plurality of stirring rods circumferentially arranged on the annular stirring discs; the first stirring shaft is electrically connected with a first motor arranged at the top of the reaction kettle; an arc-shaped stirring rod is arranged at the bottom of the first stirring shaft; the bottom of the arc-shaped stirring rod is provided with a plurality of spoilers.
Preferably, the annular stirring disc and the flow disturbing sheet are provided with a plurality of flow disturbing holes.
As an improvement of the technical scheme, a plurality of porous hollow steam discs are arranged in the distillation kettle; the porous hollow steam disc is communicated with an air inlet pipe.
Preferably, the dissolving kettle is internally provided with a second stirring device and an electric heating sheet.
Preferably, a plurality of layers of filter screens are arranged in the filter.
As an improvement of the technical scheme, the cooling crystallization kettle comprises a cooling crystallization kettle body; a jacket is arranged outside the cooling crystallization kettle body; a cooling coil is arranged in the jacket; a third stirring device is arranged in the cooling crystallization kettle; the third stirring device comprises a rotating shaft and a plurality of rotating blades arranged on the rotating shaft; the rotating shaft is electrically connected with a driving motor arranged at the top of the cooling crystallization kettle; and the rotating blade is provided with a scraper which is abutted against the inner wall of the cooling crystallization kettle.
Since the technical scheme is used, the beneficial effects of the utility model are that:
the reaction device for preparing bronopol provided by the utility model comprises a reaction kettle; a distillation kettle, a dissolving kettle, a filter, a cooling crystallization kettle, a centrifuge, a rotary dryer and a product collecting tank which are sequentially communicated with the reaction kettle; the reaction liquid outlet of the reaction kettle is communicated with the liquid inlet of the distillation kettle; the gas outlet of the distillation kettle is communicated with the liquid inlet of the reaction kettle through a condenser; a washing liquid outlet of the centrifuge is communicated with a liquid inlet of the reaction kettle through a circulating pump; the distillation kettle can condense the distilled alcohol and water and then re-enter the reaction kettle to be used as a solvent; the centrifuge carries out centrifugal treatment on the crystallized feed liquid, the solid obtained after centrifugation is washed by deionized water, and the washed liquid can enter the reaction kettle for reuse, so that the preparation cost of the bronopol is saved. A first stirring shaft is arranged in the reaction kettle, and a plurality of annular stirring discs are arranged on the first stirring shaft; a plurality of stirring rods are circumferentially arranged on the plurality of annular stirring disks; the bottom of the first stirring shaft is provided with an arc-shaped stirring rod; the bottom of the arc-shaped stirring rod is provided with a plurality of spoilers. The reaction raw materials in the reaction kettle are fully stirred in the reaction process, so that the heat exchange efficiency in the reaction kettle is improved, and the reaction efficiency is further improved.
In the reaction device for preparing bronopol provided by the utility model, a plurality of turbulent flow holes are arranged on the annular stirring disc and the turbulent flow sheet; the collision between liquid molecules in the reaction kettle can be improved, and the heat exchange efficiency is improved. A plurality of porous hollow steam discs are arranged in the distillation kettle; the steam that comes out in the porous cavity steam dish contacts with liquid more fully, and the heat transfer effect is better, and distillation efficiency is higher. A second stirring device and an electric heating plate are arranged in the dissolving kettle. Under a certain temperature and under the stirring of the second stirring device, the bronopol can be fully dissolved in the solvent, so that the bronopol and the sodium bromide can be fully separated.
In the reaction device for preparing bronopol, a rotating shaft is arranged in a cooling crystallization kettle, and a plurality of rotating blades are arranged on the rotating shaft; and the rotating blade is provided with a scraper which is abutted against the inner wall of the cooling crystallization kettle. When the feed liquid in the cooling crystallization kettle is stirred, the scraper can scrape the crystals on the inner wall of the cooling crystallization kettle; prevent the crystal wall built-up, influence the heat transfer effect of the freezing salt water in the cooling crystallization kettle jacket and the liquid in the cooling crystallization kettle body, and then improve crystallization efficiency, improve the yield of bronopol.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A;
in the figure, 1, a reaction kettle; 2. a distillation kettle; 3. a dissolving kettle; 4. a filter; 5. cooling the crystallization kettle; 6. a centrifuge; 7. a rotary dryer; 8. a product collection tank; 9. a condenser; 10. a circulation pump; 11. a first stirring shaft; 12. an annular stirring disc; 13. a stirring rod; 14. a first motor; 15. an arc-shaped stirring rod; 16. a spoiler; 17. a porous hollow steam tray; 18. an air inlet pipe; 19. an electrical heating sheet; 20. a filter screen; 21. a cooling coil; 22. a rotating shaft; 23. a rotor blade; 24. a drive motor; 25. and (4) scraping the blade.
Detailed Description
The invention is further explained below with reference to the drawings and examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
Examples
As shown in fig. 1 and fig. 2, a reaction device for preparing bronopol comprises a reaction kettle 1; a distillation kettle 2, a dissolving kettle 3, a filter 4, a cooling crystallization kettle 5, a centrifuge 6, a rotary dryer 7 and a product collecting tank 8 which are sequentially communicated with the reaction kettle 1; the reaction liquid outlet of the reaction kettle 1 is communicated with the liquid inlet of the distillation kettle 2; the gas outlet of the distillation kettle 2 is communicated with the liquid inlet of the reaction kettle 1 through a condenser 9; a washing liquid outlet of the centrifuge 6 is communicated with a liquid inlet of the reaction kettle 1 through a circulating pump 10; the distillation kettle can condense the distilled alcohol and water and then re-enter the reaction kettle to be used as a solvent; the centrifuge carries out centrifugal treatment on the crystallized feed liquid, the solid obtained after centrifugation is washed by deionized water, and the washed liquid can enter the reaction kettle for reuse, so that the preparation cost of the bronopol is saved.
A first stirring device is arranged in the reaction kettle 1, and comprises a first stirring shaft 11 arranged in the reaction kettle 1, a plurality of annular stirring discs 12 arranged on the first stirring shaft 11, and a plurality of stirring rods 13 circumferentially arranged on the annular stirring discs 12; the first stirring shaft 11 is electrically connected with a first motor 14 arranged at the top of the reaction kettle 1; further, an arc-shaped stirring rod 15 is arranged at the bottom of the first stirring shaft 11; a plurality of spoilers 16 are arranged at the bottom of the arc-shaped stirring rod 15; a plurality of turbulence holes are formed in the annular stirring disc 12 and the turbulence plate 16. The reaction raw materials in the reaction kettle are fully stirred in the reaction process, so that the heat exchange efficiency in the reaction kettle is improved, and the reaction efficiency is further improved.
In this embodiment, a plurality of porous hollow steam trays 17 are arranged in the distillation kettle 2; the porous hollow steam disk 17 is communicated with an air inlet pipe 18. The steam that comes out in the porous cavity steam dish contacts with liquid more fully, and the heat transfer effect is better, and distillation efficiency is higher. And a second stirring device and an electric heating plate 19 are arranged in the dissolving kettle 3. Under a certain temperature and under the stirring of the second stirring device, the bronopol can be fully dissolved in the solvent, so that the bronopol and the sodium bromide can be fully separated. And a plurality of layers of filter screens 20 are arranged in the filter 4.
In this embodiment, the cooling crystallization kettle 5 includes a cooling crystallization kettle body; a jacket is arranged outside the cooling crystallization kettle body; a cooling coil 21 is arranged in the jacket; a third stirring device is arranged in the cooling crystallization kettle 5; the third stirring device includes a rotating shaft 22 and a plurality of rotating blades 23 provided on the rotating shaft 22; the rotating shaft 22 is electrically connected with a driving motor 24 arranged at the top of the cooling crystallization kettle 5; the rotating blade 23 is provided with a scraper 25 which is abutted against the inner wall of the cooling crystallization kettle 5; the wall hanging of the crystal can be prevented, the heat exchange effect of the frozen brine in the jacket of the cooling crystallization kettle and the liquid in the cooling crystallization kettle body can be influenced, the crystallization efficiency is further improved, and the yield of the bronopol is improved.
Claims (6)
1. A reaction unit for preparing bronopol, its characterized in that: comprises a reaction kettle; a distillation kettle, a dissolving kettle, a filter, a cooling crystallization kettle, a centrifugal machine, a rotary dryer and a product collecting tank which are sequentially communicated with the reaction kettle; the reaction liquid outlet of the reaction kettle is communicated with the liquid inlet of the distillation kettle; the gas outlet of the distillation kettle is communicated with the liquid inlet of the reaction kettle through a condenser; a washing liquid outlet of the centrifugal machine is communicated with a liquid inlet of the reaction kettle through a circulating pump;
a first stirring device is arranged in the reaction kettle and comprises a first stirring shaft arranged in the reaction kettle, a plurality of annular stirring discs arranged on the first stirring shaft and a plurality of stirring rods circumferentially arranged on the annular stirring discs; the first stirring shaft is electrically connected with a first motor arranged at the top of the reaction kettle; an arc-shaped stirring rod is arranged at the bottom of the first stirring shaft; the bottom of the arc-shaped stirring rod is provided with a plurality of spoilers.
2. A reaction device for the preparation of bronopol according to claim 1, wherein: the annular stirring disc is provided with a plurality of turbulence holes on the turbulence sheet.
3. A reaction device for the preparation of bronopol according to claim 1, wherein: a plurality of porous hollow steam discs are arranged in the distillation kettle; the porous hollow steam disc is communicated with an air inlet pipe.
4. A reaction device for the preparation of bronopol according to claim 1, wherein: and a second stirring device and an electric heating sheet are arranged in the dissolving kettle.
5. A reaction device for the preparation of bronopol according to claim 1, wherein: and a plurality of layers of filter screens are arranged in the filter.
6. A reaction device for the preparation of bronopol according to claim 1, wherein: the cooling crystallization kettle comprises a cooling crystallization kettle body; a jacket is arranged outside the cooling crystallization kettle body; a cooling coil is arranged in the jacket; a third stirring device is arranged in the cooling crystallization kettle; the third stirring device comprises a rotating shaft and a plurality of rotating blades arranged on the rotating shaft; the rotating shaft is electrically connected with a driving motor arranged at the top of the cooling crystallization kettle; and the rotating blade is provided with a scraper which is abutted against the inner wall of the cooling crystallization kettle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022256046.3U CN213652331U (en) | 2020-10-12 | 2020-10-12 | Reaction device for preparing bronopol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022256046.3U CN213652331U (en) | 2020-10-12 | 2020-10-12 | Reaction device for preparing bronopol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213652331U true CN213652331U (en) | 2021-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022256046.3U Active CN213652331U (en) | 2020-10-12 | 2020-10-12 | Reaction device for preparing bronopol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213652331U (en) |
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2020
- 2020-10-12 CN CN202022256046.3U patent/CN213652331U/en active Active
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